It's a theme restaurant. They send you into this underground dungeon where you are greeted by the "prison guard" ( a sexy Japanese girl) who handcuffs you to take you to your "cell". The cell has bars for a door. Everybody is in costume and the drinks come in beakers and syringes. Dan's drink come with POISON that he had to add.
Then at some point they turn off the lights and there's music and smoke. Then they send monsters around in costumes to scare you and rattle your cell door.
When the lights go out all you hear are girls screaming. It was fun.